Level.



J.v SAND & J. SAND', Ji.. LEVEL. APrLIoATIoN funi) 061213, 1 913.

1,087,555.` Patented Febf17,1j9414.

q/viftmeoow I m atto@ 17d To all 'whom it may concern? JULIUs SAND, Jr., citizens of the United .l

' STATES regalar OFFICE.

' Jumps slam) AND .'r'ULIUs SAND, m., or nErnorr,-1vrrcnrsn1v.

Be"`t known; that we, JULrUs SAND and' States 'of America, residing at, Detroit, in the county of Wayne' and State of Michigan, have. invented certain new and useful Improvements in Levels, of which the following is a specification, reference being' arrangement thereof whereby the tubes' when once set are not readily displaced and whereby the level may be readjusted-in case.

'of accident. I

The 'invention consists in the matters herei inafter set forth and more particularly pointed out in the appended-claims.

In `the drawings, Figure 1 is a plan ,view of one form of level that embodies features of the invention; Fig. 2 is an enlarged view in transverse section through the middle 'portion of the level showing the tubes in position; Fi 3 is a view in detail taken on or about line III-III of Fig. 2, with the section line II-II indicating the plane of view of Fig.-2; Fig. et is a' view in detail taken on or about line III- III of Fig. 2 with the tubes removed; Figs. 5 and 6 are views in detail showing the method of securing the single tubeg and Fi 7 is a view in detail showing an adjustab e holder for the tubes.

Referring to the `drawings, a bodv or frame 1 is formed prcferablylot aluminum alloy or other light metal with a central tube opening and symmetrically disposed plummet tube openings. Each of theopenings is encircled by an inner annular flange 2 with corresponding shoulders 3 formed by'rabbets on each side. End socket Aopenings 4.- to receive the level tubes 5 of thc central openingare formed in the flange of the central opening. At 'a diametrical point, a lsingle recess 6 is formed with a mutral 'slot whereby the ends of the tubes -L .may 'be readilyentered and moved to position. Cement filling 8 retains the tubesv in position .the--metal that overlics them on both side.; preventing dislodgrricnt of tue holding material. disks 9 are seated Specification of Letters Patent. Application filed October 13, 1 913. Serial Nd. 794,780.

` Patented Fenu, 1914.

on the shoulders 3 and held in place by cement orwax 10. e

At the plummet openings which are preferably circular, the inner annular ilangell with rabbeted shoulders 12 on either side hasa recess 13 on one side and a. diametrically opposite recess 14 withinner slot 15 on the .other side whereby a plummet tube 16 may' be readily entered and secured by cement or wax filling indicated at 17. Glass disks cover the plummet tubes as they do the level tubes. i Y

In place of. securing the tubes directly in the body of the level they may be mounted las indicated in Fig. 7.` A bushing 18 has an annular flange 19 whereby it may be centered in the tube opening of the level body which is properly counterbored to receive it. The shell of the bushing is itself provided with an annular seat A2O forthe reception of a gla disk 21 'and -is likewise recessed at diametrically opposite points in a manner similar to the openings previously described. A clamping collar 22 that is fitted with a guard glass disk 23 is in serewthreaded en. gagcmentwith the bushingwhereby an outer drawn to seat in a counterbored bearing shoulder of the'level body. This permits angular adjustment of the tubes after being mounted in the level body and their ready withdrawal for inspection or replacement.

annular iange 24 of the collar may be@ In ordinary level construction particu.

larly where metallic bodies are used, it is usual to insert the tubesin position through apertures in the sides ofthe body which are afterward plugged. This gives a chance fon'the entrance of dirt or liquid into the tube chamber. By the construction herein show-n, the tubes are inclosed in a hermetically scaled chamber. By the use of the adjustable holder the tubes may be readily turned into proper relation to the bearing surfaces ot the level after insertion. The holder itself forms an air tight' and dust prooi" chamber. Because of the disposition of the tubes and holding cement or wax does not. tend to work out as the margin of tlie recesses prevent its lateral displacement. The holder 'may be used-with a wooden tube ii desired.

Obviously, changes -may'be made in the details ot' construction without departing from thc spirit of our invention and we do not care lo limit ourselves to any particular for-'m or -arrangement of parts.'

W'hat We claim is I i 1. In a, spirit level, the combination of a 'body' having tube openings, with a holder for each opening, consisting of a bushing having an inner annular flange with oppositely disposed recesses therein, one oi Whieh has an off-set slot extending to the margin of the flange, a collar in screwthreaded engagement with the bushing, and ooperating therewith to seeure it in the body, and tubes in the bushing Whose end portions are embedded in sealing material. filling the recesses.

:2. The coinbinationin a spirit level of a, body having tube openings whose ends are counterbored, with' tube holders each consisting of a sleeve having an outer annular flange seated in a counterbored end of a body opening, an inner annular flange provided with oppositely disposed recesses, one of- .which has an off-set s ot extending into the margin of the flange, an exteriorly flanged clampn collar screwthreaded on to the inner end 0% theJ bushing land Seate'd in the other counterbor'ed end of the body opening, tubes whose end portions are embedded in sealing material filling the bushing recesses, a ,transparent'disk sealed inthe outer end of the bushing and a 'transparent guard disk sealed in the clamping collar.

In testimony whereof We alix our signatures in presence of two witnesses. 

